Question

1. We have a sample of NES games that are either sports games or action/adventures and consider North American Sales (in millions of dollars). Is there evidence that action/adventure games sold better in North American than sports games? Assume each sample shows evidence of a normal distribution.                                                                                                                                                (15 points)

1. Explain why the two-sample t test is the correct method for the following data:

	Sports	Action
Mean	0.649	1.541667
Std Dev	0.62417	1.082714
size	11	12

2. Use the recommended sequence of steps:

1.         Identify the parameter of interest and describe it in the context of the problem situation:

2.         Determine the null value and state the null hypothesis:

3.         State the appropriate alternative hypothesis:

4.   Give the formula for the computed value of the test statistic (substituting the null value and the known values of any other parameters, but not those of any sample-based quantities):

5.         Compute any necessary sample quantities, substitute into the formula for the test statistic value and compute that value:

6.         Determine the P-value (NOTE: the calculation for degrees of freedom results in 17 df):

7.         Compare the selected or specified significance level to the P-value to decide whether H₀ should be rejected, and state this conclusion in the problem context:

Answer 1